From b5fdaa85790dff45fd2c3fd15405c16dbc50a074 Mon Sep 17 00:00:00 2001
From: Stafford Horne <shorne@gmail.com>
Date: Sun, 2 May 2021 06:02:14 +0900
Subject: [PATCH] or1k: Fix issue with plt link failure for local calls

When building protobuf we were seeing the assert failure:

    /home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
    BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
    /home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
    BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
    /home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
    BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
    collect2: error: ld returned 1 exit status

This failure happens while writing out PLT entries, there is a check
"BFD_ASSERT (h->dynindx != -1)" to confirm all plt entries have dynamic
symbol attributes.  This was failing for symbols that were
"forced_local" in previous linking code.

The fix adds logic to or1k_elf_adjust_dynamic_symbol to identify
"forced_local" symbols and exclude them from the the PLT.

bfd/ChangeLog:

	PR 27624
	* elf32-or1k.c (or1k_elf_adjust_dynamic_symbol): Change
	condition used to cleanup plt entries to cleanup forced local
	entries.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
---
 bfd/elf32-or1k.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/bfd/elf32-or1k.c b/bfd/elf32-or1k.c
index 65938e51378..4f82cc4c667 100644
--- a/bfd/elf32-or1k.c
+++ b/bfd/elf32-or1k.c
@@ -2566,11 +2566,10 @@ or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
   if (h->type == STT_FUNC
       || h->needs_plt)
     {
-      if (! bfd_link_pic (info)
-	  && !h->def_dynamic
-	  && !h->ref_dynamic
-	  && h->root.type != bfd_link_hash_undefweak
-	  && h->root.type != bfd_link_hash_undefined)
+      if (h->plt.refcount <= 0
+	  || (SYMBOL_CALLS_LOCAL (info, h)
+	  || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+	      && h->root.type == bfd_link_hash_undefweak)))
 	{
 	  /* This case can occur if we saw a PLT reloc in an input
 	     file, but the symbol was never referred to by a dynamic
-- 
2.25.1

